Labyrinth of the Sky is the first Zone of Sonic Labyrinth. As with other Zones in this game, Labyrinth of the Sky consists of three standard Acts followed by a shorter fourth Act which contains a downhill slide and the Zone's boss.
Labyrinth of the Sky is a sky-bound area with a checkerboard floor pattern. Common obstacles are slick floor panels, which speed up movement but also makes it difficult to control, pinball bumpers and flippers that bounce Sonic around, and conveyor belts. These features reappear in subsequent levels too; perhaps the most annoying hazards unique to the Labyrinth of the Sky are the glue-spitting Peppepe Badniks, who make Sonic squelch to a halt before slowly trundling into the hedgehog to dislodge his keys.
The timer in the first three Acts starts off at 60 seconds. The Zone's boss is Mecha Gorilla.
||Welcome to the great wide open! Bumpers and flippers fling you across the maze like a little blue pinball. Springs let you leap to higher levels. Badniks fire sticky wads of glue to slow you down so they can attack.
— Sonic Labyrinth US manual
||Peppepe — Toy ducks that roll along the ground and cough up sticky white puddles. Step in a puddle and Sonic becomes momentarily immobilized.
||Toriri — Bird bots that jet mindlessly across the board. ("Tori" is Japanese for bird.)
||Flowawa — Immobile flower bots that spout damage-inflicting spores in all directions.